Surah An-Nahl 16:93

وَلَوْ شَآءَ ٱللَّهُ لَجَعَلَكُمْ أُمَّةً وَٰحِدَةً وَلَـٰكِن يُضِلُّ مَن يَشَآءُ وَيَهْدِى مَن يَشَآءُ ۚ وَلَتُسْـَٔلُنَّ عَمَّا كُنتُمْ تَعْمَلُونَ

And if Allāh had willed, He could have made you [of] one religion, but He sends astray whom He wills and guides whom He wills. And you will surely be questioned about what you used to do.

Translation: Saheeh International

Tafsir

For if God had willed He could have made you one community people of a single religion but He leads astray whom He will and guides whom He will and you will surely be questioned on the Day of Resurrection a questioning of rebuke about what you used to do so that you might be requited for it.

Excerpt from Tafsir al-Jalalayn, commentary on 16:93, via Quran.com. The reader has the full commentary and 9 more tafsirs.